Fluid pump device

ABSTRACT

A fluid pump device contains: a fluid storage barrel, a cap, and a manual pumping mechanism. The fluid storage barrel includes a fluid accommodation chamber and an air chamber. The cap is configured to close the fluid accommodation chamber and the air chamber, and the cap includes a connector configured to connect with a fluid delivery tube and communicating with the fluid accommodation chamber, an air conduit communicating with the fluid accommodation chamber and the air chamber, and a check valve communicating with the air conduit. The manual pumping mechanism includes a press stem extending through the cap and the air chamber, an operation lever mounted on a top of the press stem, and a one-way piston connected on a bottom of the press stem, wherein the fluid storage barrel includes a single-way discharge valve fixed on a bottom of the air chamber.

FIELD OF THE INVENTION

The present invention relates to a fluid pump device which contains thefluid accommodation chamber and the air chamber of the fluid storebarrel one-piece formed to avoid air and fluid leakage.

BACKGROUND OF THE INVENTION

A conventional fluid pump device is applied to discharge fluid out ofvehicle via a delivery tube, thus replacing the fluid (i.e., maintenancefluid, oil, fuel, lubricant, or engine oil, etc.).

When the conventional fluid pumping device is operated manually andcontains a fluid storage barrel, a pumping mechanism received in thefluid storage barrel, an air accommodation chamber, and a fuel tube.However the pumping mechanism is made of metal, and the fluid storagebarrel is made of plastic, thus causing air and fluid leakage easilybecause of a gap between the air accommodation chamber and the fueltube.

The present invention has arisen to mitigate and/or obviate theafore-described disadvantages.

SUMMARY OF THE INVENTION

The primary aspect of the present invention is to provide a fluid pumpdevice which contains the fluid accommodation chamber and the airchamber of the fluid store barrel one-piece formed to avoid air andfluid leakage.

To obtain the above mentioned aspect, a fluid pump device provided bythe present invention contains: a fluid storage barrel, a cap, and amanual pumping mechanism.

a fluid storage barrel including a fluid accommodation chamber and anair chamber which is one-piece formed with and is separated from andsurrounded by the fluid accommodation chamber;

a cap mounted on a top of the fluid storage barrel and configured toclose the fluid accommodation chamber and the air chamber, wherein thecap includes a connector configured to connect with a fluid deliverytube and communicating with the fluid accommodation chamber, an airconduit communicating with the fluid accommodation chamber and the airchamber, and a check valve communicating with the air conduit; and

a manual pumping mechanism including a press stem extending through thecap and the air chamber, an operation lever mounted on a top of thepress stem, and a one-way piston connected on a bottom of the pressstem, wherein the fluid storage barrel includes a single-way dischargevalve fixed on a bottom of the air chamber.

Preferably, the check valve has a first spring accommodated in the airconduit, and the check valve has a plug pushed by the first spring toclose the air conduit.

Preferably, the cap further includes a guide tube received in the fluidaccommodation chamber and connected with the air conduit, the guide tubehas multiple through orifices formed on a peripheral side thereof, andthe guide tube has a close element received therein and configured toclose the multiple through orifices when a level of fluid (such as oil,fuel, lubricant, or engine oil, etc.) in the fluid accommodation chamberincreases.

Preferably, the one-way piston includes a first disc, a second disc, anda rubber ring, wherein a slit is defined between the first disc and aninner wall of the air chamber so that the airs flow, the second disc hasat least one notch defined thereon and configured to flow the airs, andthe rubber ring is defined between the first disc and the second discand is pushed by the first disc and the second disc; when the first discis pushed, the slit between the first disc and the inner wall of the airchamber is shaded.

Preferably, the cap further includes a handle fixed on a top thereof.

Preferably, the cap further includes an air inlet defined thereon andcommunicating with an external environment and the air conduit, and apressure relief valve configured to close the air inlet, wherein areceiving pressure of the pressure relief valve is more than a receivingpressure of the check valve.

Preferably, a holder is configured to accommodate the fluid store barreland has multiple discharge holes communicating with the air chamber, thesingle-way discharge valve is arranged on the holder, and the single-waydischarge valve has a second spring and an air discharging valve pushedby the second spring to close the air chamber and the multiple dischargeholes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the assembly of a fluid pump deviceaccording to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional perspective view showing the explodedcomponents of the pumping device according to the preferred embodimentof the present invention.

FIG. 3 is a perspective view showing the exploded components of a partof the pumping device according to the preferred embodiment of thepresent invention.

FIG. 4 is a cross sectional view showing the operation of a part of thepumping device according to the preferred embodiment of the presentinvention.

FIG. 5 is another cross sectional view showing the operation of a partof the pumping device according to the preferred embodiment of thepresent invention.

FIG. 6 is also another cross sectional view showing the operation of apart of the pumping device according to the preferred embodiment of thepresent invention.

FIG. 7 is still another cross sectional view showing the operation of apart of the pumping device according to the preferred embodiment of thepresent invention.

FIG. 8 is another cross-sectional perspective view showing the explodedcomponents of the pumping device according to the preferred embodimentof the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will be clearer from the following descriptionwhen viewed together with the accompanying drawings, which show, forpurpose of illustrations only, a preferred embodiment in accordance withthe present invention.

With reference to FIGS. 1-3, a fluid pump device according to apreferred embodiment of the present invention comprises: a fluid storage1, a manual pumping mechanism 2, and a cap 3.

The fluid storage barrel 1 includes a fluid accommodation chamber 11 andan air chamber 12 which is one-piece formed with and is separated fromand surrounded by the fluid accommodation chamber 11.

The cap 3 is mounted on a top of the fluid storage barrel 1 and isconfigured to close the fluid accommodation chamber 11 and the airchamber 12. The cap 3 includes a connector 31 configured to connect witha fluid delivery tube and communicating with the fluid accommodationchamber 11, an air conduit 32 communicating with the fluid accommodationchamber 11 and the air chamber 12, and a check valve 33 communicatingwith the air conduit 32.

The manual pumping mechanism 2 includes a press stem 21 extendingthrough the cap 3 and the air chamber 12, an operation lever 22 mountedon a top of the press stem 21, and a one-way piston 23 connected on abottom of the press stem 21, wherein the fluid storage barrel 1 includesa single-way discharge valve 13 fixed on a bottom of the air chamber 12,such that when the one-way piston 23 is pressed, the single-waydischarge valve 13 is driven by the one-way piston 23 to discharge airsfrom the air chamber 12.

Referring to FIG. 4, when desiring to draw fluid, the connector 31 isconnected with the fluid delivery tube and an external fluid supplysource, and the operation lever 22 is pressed so that the one-way piston23 matingly contacts with the air chamber 12, and the airs of the fluidaccommodation chamber 11 force the check valve 33 to turn on and flowinto the air chamber 12 via the air conduit 32. Thereafter, the airs arepumped out of the fluid accommodation chamber 11 to produce a negativepressure, and the external fluid supply source is guided into the fluidaccommodation chamber 11 via the connector 31, thus pumping the fluidmanually. Preferably, the fluid accommodation chamber 11 and the airchamber 12 of the fluid store barrel 1 are one-piece formed to avoid theair and fluid leakage.

The check valve 33 has a first spring 331 accommodated in the airconduit 32, and the check valve 33 has a plug 332 pushed by the firstspring 331 to close the air conduit 32.

The cap 3 further includes a guide tube 34 received in the fluidaccommodation chamber 11 and connected with the air conduit 32, whereinthe guide tube 34 has multiple through orifices 341 formed on aperipheral side thereof, and the guide tube 34 has a close element 342received therein and configured to close the multiple through orifices341 when a level of the fluid in the fluid accommodation chamber 11increases, as shown in FIG. 7. Thereafter, the manual pumping mechanism2 does not pump the airs out of the air chamber 12, thus stoppingdrawing the fluid and avoiding fluid leakage.

As illustrated in FIGS. 5 and 6, the one-way piston 23 includes a firstdisc 231, a second disc 232, and a rubber ring 233, wherein a slit isdefined between the first disc 231 and an inner wall of the air chamber12 so that the airs flow, the second disc 232 has at least one notch2321 defined thereon and configured to flow the airs, and the rubberring 233 is defined between the first disc 231 and the second disc 232and is pushed by the first disc 231 and the second disc 232. When thefirst disc 231 is pushed, the slit between the first disc 231 and theinner wall of the air chamber 12 is shaded, the one-way piston 23 movesto press the first disc 231, and the rubber ring 233 is pushed so thatan airtight space forms increasingly in the press stem 21 above theone-way piston 23 to draw the airs from the fluid store barrel 1. Whenthe one-way piston 23 moves upward to push the rubber ring 233 by thesecond disc 232, an airtight effect between the first disc 231 and thepress stem 21 is released so that the airs in the air chamber 12 abovethe one-way piston 23 flow into the air chamber 12 below the one-waypiston 23 via the at least one notch 2321.

The cap 3 further includes a handle 35 fixed on a top thereof, an airinlet 36 defined thereon and communicating with an external environmentand the air conduit 32, and a pressure relief valve 37 configured toclose the air inlet 36, wherein a receiving pressure of the pressurerelief valve 37 is more than a receiving pressure of the check valve 33,such that when the fluid accommodation chamber 11 does not accommodatethe fluid fully and the fluid is drawn, the check valve 33 is notinfluenced by the pressure relief valve 37, and when the close element342 closes the air conduit 32 and the fluid is drawn, the pressurerelief valve 37 removes from the air conduit 32 so as to release apressure in the air conduit 32.

With reference to FIG. 8, a holder 14 is configured to accommodate thefluid store barrel 1 and has multiple discharge holes 141 communicatingwith the air chamber 12, wherein the single-way discharge valve 13 isarranged on the holder 14, and the single-way discharge valve 13 has asecond spring 131 and an air discharging valve 132 pushed by the secondspring 131 to close the air chamber 12 and the multiple discharge holes141, such that when the one-way piston 23 presses the air dischargingvalve 132, the airs push the second spring 131 so that the airs aredischarged out of the air chamber 12 via the multiple discharge holes141.

While various embodiments in accordance with the present invention havebeen shown and described, it is clear to those skilled in the art thatfurther embodiments may be made without departing from the scope of thepresent invention.

What is claimed is:
 1. A fluid pump device comprising: a fluid storagebarrel including a fluid accommodation chamber and an air chamber whichis one-piece formed with and is separated from and surrounded by thefluid accommodation chamber; a cap mounted on a top of the fluid storagebarrel and configured to close the fluid accommodation chamber and theair chamber, wherein the cap includes a connector configured to connectwith a fluid delivery tube and communicating with the fluidaccommodation chamber, an air conduit communicating with the fluidaccommodation chamber and the air chamber, and a check valvecommunicating with the air conduit; and a manual pumping mechanismincluding a press stem extending through the cap and the air chamber, anoperation lever mounted on a top of the press stem, and a one-way pistonconnected on a bottom of the press stem, wherein the fluid storagebarrel includes a single-way discharge valve fixed on a bottom of theair chamber.
 2. The fluid pump device as claimed in claim 1, wherein thecheck valve has a first spring accommodated in the air conduit, and thecheck valve has a plug pushed by the first spring to close the airconduit.
 3. The fluid pump device as claimed in claim 1, wherein the capfurther includes a guide tube received in the fluid accommodationchamber and connected with the air conduit, the guide tube has multiplethrough orifices formed on a peripheral side thereof, and the guide tubehas a close element received therein and configured to close themultiple through orifices when a level of the fluid in the fluidaccommodation chamber increases.
 4. The fluid pump device as claimed inclaim 1, wherein the one-way piston includes a first disc, a seconddisc, and a rubber ring, wherein a slit is defined between the firstdisc and an inner wall of the air chamber so that the airs flow, thesecond disc has at least one notch defined thereon and configured toflow the airs, and the rubber ring is defined between the first disc andthe second disc and is pushed by the first disc and the second disc;when the first disc is pushed, the slit between the first disc and theinner wall of the air chamber is shaded.
 5. The fluid pump device asclaimed in claim 1, wherein the cap further includes a handle fixed on atop thereof.
 6. The fluid pump device as claimed in claim 1, wherein thecap further includes an air inlet defined thereon and communicating withan external environment and the air conduit, and a pressure relief valveconfigured to close the air inlet, wherein a receiving pressure of thepressure relief valve is more than a receiving pressure of the checkvalve.
 7. The fluid pump device as claimed in claim 1, wherein a holderis configured to accommodate the fluid store barrel and has multipledischarge holes communicating with the air chamber, the single-waydischarge valve is arranged on the holder, and the single-way dischargevalve has a second spring and an air discharging valve pushed by thesecond spring to close the air chamber and the multiple discharge holes.